Olive Warbler
Olive Warbler has surged: up 611% on the route-weighted index since 1979.
About the Olive Warbler
The Olive Warbler (Peucedramus taeniatus) is a North American member of the Olive Warbler (Peucedramidae). In this analysis it is grouped with the forest birds.
- Size
- about 5 in long (13 cm) — a small songbird (typical for the family)
- Habitat
- Woodlands and forest edges, including wooded suburbs and parks.
- Diet
- Insects and spiders gleaned from foliage and bark, with seeds and berries in season.
- Range
- Recorded on 16 Breeding Bird Survey routes across 2 states, most concentrated in the Sierra Madre Occidental.
- Family
- Peucedramidae · Forest birds
Notable Olive Warbler Trends
No notable trend signals for Olive Warbler. See the full index history below.
Olive Warbler Population Forecast
If the recent trend holds, Olive Warbler is projected to stay roughly flat through 2029, near 0.01 (95% range 0.00–0.01). A 5-year backtest shows a typical error of ±90%, with 80% of held-out values landing inside the 95% band.
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.01 | 0.00 | 0.01 |
| 2026 | 0.01 | 0.00 | 0.01 |
| 2027 | 0.01 | 0.00 | 0.01 |
| 2028 | 0.01 | 0.00 | 0.01 |
| 2029 | 0.01 | 0.00 | 0.01 |
Where the Olive Warbler Is Detected
BBS routes recording Olive Warbler, sized by most recent count.
Olive Warbler Population Trend by State
| Arizona | +273% | 1979 | 13 |
| New Mexico | +79% | 1995 | 3 |
Olive Warbler Population Trend by Region
Bird Conservation Regions are the ecological unit for trends.
| Sierra Madre Occidental | +301% | 1979 | 16 |
Olive Warbler Conservation Status
Our route-weighted index shows it up about 611% since 1979.
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. Trend is a route-weighted relative-abundance index, not an absolute population.